Stationary boiler



(No Model.)

D. W. Mo-CALLUM. STATIQNARY BQILER.

No. 596,785. Y Patented Jan. 4,1898.

DANIEL lV. MCOALLUM, OF ST. LOUIS, MISSOURI, ASSIGNOR OF 'IllO-TI-IIRDS TO WILLIAM E. IIUIlLl-IOFF, OF FORT 'WORTI-I, AND J EFF L. FINLEY, OF

Denison, TEXAS.

STATIONARYBOILER.

SPECIFICATION forming part of Letters Patent No. 596,785, dated January 4, 1898.

Application tiled March l0, 1896. Renewed August 2G, 1897. Serial No. 649,652. (No modell) To E whom; t may concern/z Be it known that I, DANIEL W. MCCALLUM, of the city of St. Louis, State of Missouri, have invented certain new and useful lm- 5 provements in Stationary Boilers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

My invention relates toa high-pressure 1o steam-boilerg and it consists in the novel construction, combination, and arrangement of parts hereinafter described and claimed.

The object of my inventionl is to vprovide a steam-boiler for marine, locomotive, and

stationary purposes which shall possess many advantages over the steam-boilers heretofore in use, both in strength and durability, and which shall be capable of carrying a much hig ier pressure with greater safety, and that 2o can be built to any desiredcapacity without in any manner decreasing its strength or aiecting its usefulness.

In the drawings3 Figure l is a perspective view of my improved boiler inits setting, parts 2 5 of the brickwork and arch being broken away to better illustrate'niy invention. Fig. 2 is a longitudinal sectional view taken on the line 2 2 of Fig. l, the ilues being shown partly in section and partly in elevation. Fig. 3 is a 3o transverse sectional view taken on either of the lines 3 3 of Fig.

Referring by numerals to the accompanying drawings, l represents the brickwork of the boiler-setting, the same being broken away to show the boiler. The boiler consists of a number of small round shells 3, which connect at the ends of the boiler with the square shells 3d and 3l. The square shell 3 is formed by the sheets 8 and lO andthe 4o Wrought-iron frame l2, to which said sheets are connected, said sheets being of boilermetal and are held. to each side of the frames by securely riveting thereto. The square shell 3" is formed by the sheets 7' and El and the Wrought-iron frame 13, to which said sheets are connected, said sheets being of boiler-metal and held to each side of the frames by securely riveting thereto. The

frames 12 and i3 may be of any suitable 5o Width and thickness and have holes drilled through them by which they may be riveted to the respective sheets. The shells 3 and 3b are stayed bythe stay-bolts 18 in any convenient manner.

The round shells 3 are securely joined to the tivo inner sheets 7 and 8, and through thesev shells extend the tubes 9, which are securely joined to the two outer sheets ilil and l0 at their respective ends, which are termed the flue-sheets. To'the outer sheet 9a of the shell 3b is secured the base of the smokestack. From the inner sheet 7 of the shell 3l a steam-pipe I6 communicates with the steam-dome l5, and from the inner sheet 8 of the shell 3 a steam-pipe la communicates with the opposite side of said steam-dome. Tufo small vertical pipes lli `convey the steam from the two upper shells 3 of the outer rows to the steam-dome l5, and fillings of fire-clay A 5 and 6 close the spaces between the upper rouT of shells, thus preventing the heat from escaping from the upper part of the boiler.

There are ordinary gratos under the boiler. Archwork 4 extends from the brickwork to the upper outside shells. The steam-dome l5 has an outlet I7 to the engine. The space in the shell 3 outside of the tube 9 connects with the space in the shells 3 and 3b and together form the steam and Water space.

In illustrating my invention I have shown in the drawings a marine boiler; but the invention is equally applicable to a locomotive, stationary, and all other classes of steamboilers.

It will be noticed that the shells 3 and 3b are placed in three rows with three shells in each row, the same being arranged horizontally, one above the other; but any number, length, or diameter of shells may be employed in this class of steam-boilers Without departing from the principle of my invention.

-A locomotive-boiler will have four or more of the small shells 3, which form the body of the boiler, and one square shell forming the front end of the boiler, the four or more small shells joining the inner sheetr at the front end and Will be joined to the throat-sheet at furnace end of the boiler.

I desire it understood that such changes as Would be required and coming Within ordinary mechanical skill may be made Without departing from the principle of my invention.

IOO

l throughout the entire boiler.

A steam-boiler constructed in accordance with my invention will be found to be a perfect generator, as the heat will perform a double application on the shells and tubes both externally and internally and the Water and steam will have a perfect circulation rlhe steam will have a perfect iioW from all parts of the boiler and will be conveyed through the steam-reservoir and through the four steampipes connecting therewith at the four points of the boiler. In this class of steam-boilers any desired capacity can be obtained by increasing the shell in length and diameter and increasing the number of tubes.

In the practical operation of my improved high-pressure boiler fire is built upon the grate in the ordinary Way. The heat surrounds the shells 3 and the draft carries the smoke and gases back behind the flue-sheet l0, and from thence the draft passes through the ues 9 to the base of the smoke-stack and thence up said stack.

Among the advantages I claim for my invention is the fact that a plurality of small shells Will stand a far greater steam-pressure than will a large shell constructed of the same material and the further fact that it presents a greater heating-surface to the fire in proportion to the volume of Water than anyof the old devices.

I claim-A l. In a steam-boiler, a series of water-shells in horizont-al parallel positions,a series of fireflues in each of said Water-shells, a verticallypositioned Water-jacket at each 'end of said shells, said shells being attached to the inner Walls of said jackets and said lire-fines being attached to the outer Walls of said jackets and the upper ends of said jackets extending above the upper ones of said Water-shells, a steam-dome above said water-shells, steam connections between the upper ends of said Water-jackets and said steam-dome, masonry between the upper ones of said water-shells` a smoke-stack base at one end of said watershells and a fireplace under said water-shells and communicating with the ends of said fireii'ues opposite said smoke-stack, substantially as specied.

2. In a steam-boiler, a series of Water-shells in horizontal parallel positions, a series of Iii-eiiues in each of said water-shells, a verticallypositioned water-jacket at each end of said shells, said shells being attached to the inner walls of said jackets and said fire-fines being attached to the outer walls of said jackets and the upper ends of said jackets extending above the Lipper ones of said Water-shells, masonry between the upper ones of said Watershells, a smoke-stack base at one end of said Water-shells7 a iireplace under said Watershells and communicating with the ends of said fire-fines opposite said smoke-stack. a steam-dome shell positioned above said wate rshells and transversely thereof, steam connections between the upper ones of said water-shells and said steain-donie, and steam connections between the upper ends of said Water-jackets and said steam-dome, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

DANIEL W. HCCALLUM.

Witnesses:

S. G. WELLS, MAUD GRIFFIN. 

